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Related Experiment Video

Updated: Mar 7, 2026

Synthesis of 1,2-Azaborines and the Preparation of Their Protein Complexes with T4 Lysozyme Mutants
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Structure and electronics in dimeric boron π expanded azine and salphen complexes.

Laura A Crandall1, Mahesh B Dawadi, Tailon Burrell

  • 1Department of Chemistry, University of Akron, Akron, OH 44325-3601, USA. ziegler@uakron.edu.

Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology
|March 1, 2017
PubMed
Summary

Researchers developed novel boron-based fluorophores using π-expanded boron salphen and azine derivatives. These new compounds exhibit distinct boron difluoride (BF2) binding behaviors, offering potential for advanced optical applications.

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Area of Science:

  • Materials Chemistry
  • Supramolecular Chemistry
  • Photophysics

Background:

  • Boron-based fluorophores with nitrogenous chelating ligands are of significant interest.
  • Limited research exists on boron-salphen and azine derivatives as fluorophores.

Purpose of the Study:

  • To synthesize and characterize novel π-expanded boron salphen type complexes.
  • To investigate the coordination behavior of boron difluoride (BF2) with azine and salphen ligands.
  • To explore the electronic structures and photophysical properties of these new boron complexes.

Main Methods:

  • Synthesis of boron complexes incorporating bis(2-hydroxynaphthaldehyde)azine and ortho, meta, para variants of 2-hydroxynaphthaldehyde salphen.
  • Full characterization using X-ray diffraction analysis.
  • Computational studies employing Density Functional Theory (DFT) and Time-Dependent DFT (TDDFT).

Main Results:

  • Formation of a single BF2 adduct with the azine derivative.
  • Observation of dimeric BF2 binding with the naphth-phen (salphen) compounds.
  • Detailed structural and electronic insights obtained from X-ray diffraction and DFT/TDDFT calculations.

Conclusions:

  • Successful synthesis of novel π-expanded boron salphen and azine complexes.
  • Demonstration of differential BF2 binding modes based on ligand structure.
  • Elucidation of electronic structures providing a foundation for designing new boron-based fluorophores.